Mukhtasar Bukhari

Narrated by Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) from the Messenger of Allah (peace and blessings of Allah be upon him) that he said: "Every caliph has two inner advisors; one encourages and directs him towards good, and the other directs him towards evil and wickedness. And the one who is protected (innocent) is he whom Allah Almighty safeguards from sins."